Image display device

Abstract

An image display device includes: a light blocking part arranged outside an effective scanning range within a light scanning range of an optical scanning part and including opening regions through which a portion of light scanned at a position outside the effective scanning range passes and a mask region which blocks remaining light; and a radiation part which radiates the light which passes through the opening regions out of the light scanned by the optical scanning part at the position outside the effective scanning range to the outside of the image display device. Corresponding to a state of the image display device, the opening region through which the light passes is decided out of the plurality of opening regions. Light is radiated from the light source part when a scanning position of the optical scanning part is positioned at least in the opening region decided in this manner.

1 . An image display device comprising:
 a light source part which is configure to radiate light corresponding to intensity of an image signal;   an optical scanning part which is configured to scan the light radiated from the light source part two-dimensionally;   a control part which is configured to control the light source part and the optical scanning part so as to allow the optical scanning part to scan the light radiated from the light source part within an effective scanning range thus displaying an image;   a light blocking part which is arranged at a position outside the effective scanning range within a light scanning range of the optical scanning part, and includes an opening region through which a portion of light scanned at a position outside the effective scanning range passes and a mask region which is configured to block remaining light; and   a radiation part which is configured to radiate the light which passes through the opening region formed in the light blocking part out of the light scanned by the optical scanning part at the position outside the effective scanning range to the outside of the image display device.   
     
     
         2 . The image display device according to  claim 1 , wherein the plurality of opening regions are formed in the light blocking part,
 the radiation part includes a plurality of radiation regions which are configured to radiate lights which pass through the respective opening regions to the outside of the image display device, and   the control part is configured to decide the opening region through which the light is allowed to pass out of the plurality of opening regions corresponding to information to be notified to a user, and is configured to allow the light source part to radiate light when a scanning position of the optical scanning part is positioned in the decided opening region.   
     
     
         3 . The image display device according to  claim 1 , wherein the light source part is configured to radiate lights of different colors,
 the control part is configured to set the light radiated from the light source part at a position of the opening region formed in the light blocking part within the scanning range of the optical scanning part to light of color corresponding to information to be notified to the user.   
     
     
         4 . The image display device according to  claim 1 , wherein the control part is configured to change a duration of a control for allowing the light source part to radiate the light at a position of the opening region formed in the light blocking part within the scanning range of the optical scanning part corresponding to information to be notified to the user. 
     
     
         5 . The image display device according to  claim 1 , wherein the control part is configured to, when the control part determines that the image display device is in a normal state, perform a control which allows the light source part to radiate light at a position of the opening region of the light blocking part within a scanning range of the optical scanning part. 
     
     
         6 . The image display device according to  claim 1 , wherein the optical scanning part includes a high-speed scanning part which scans light at a relatively high speed in a first scanning direction and a low-speed scanning part which scans light at a relatively low speed in a second scanning direction which is a direction intersecting with or arranged orthogonal to the first scanning direction, and
 the control part is configured, when the control part determines that the image display device is in an abnormal state, to set a scanning position of the low-speed scanning part in the second scanning direction so as to assume a position corresponding to the opening region formed in the light blocking part, and to perform a control which allows the light source part to radiate light at a position of the opening region formed in the light blocking part within the scanning range of the high-speed scanning part.   
     
     
         7 . The image display device according to  claim 1 , wherein the optical scanning part includes a high-speed scanning part which scans light at a relatively high speed in a first scanning direction and a low-speed scanning part which scans light at a relatively low speed in a second scanning direction which is a direction intersecting with or arranged orthogonal to the first scanning direction, and
 the control part is configured, when the control part determines that the image display device is in a standby state where the image is not displayed, to set a scanning position of the low-speed scanning part in the second scanning direction so as to assume a position corresponding to the opening region formed in the light blocking part, and to perform a control which allows the light source part to radiate light at a position of the opening region formed in the light blocking part within the scanning range of the high-speed scanning part.   
     
     
         8 . The image display device according to  claim 1 , wherein the optical scanning part includes a high-speed scanning part which scans light at a relatively high speed in a first scanning direction and a low-speed scanning part which scans light at a relatively low speed in a second scanning direction which is a direction intersecting with or arranged orthogonal to the first scanning direction, and
 the light blocking part is constituted of a first light blocking part and a second light blocking part which are arranged in a spaced-apart manner from each other in the second scanning direction with the effective scanning region sandwiched therebetween, and each light blocking part includes the opening region and the mask region.   
     
     
         9 . The image display device according to  claim 8 , wherein the control part determines whether or not the image display device is in an abnormal state, and the control part performs a control which allows the light source part to radiate light at a position of the opening region formed in the first light blocking part within the scanning range of the optical scanning part when the control part determines that the image display device is in an abnormal state, and a control which allows the light source part to radiate light at a position of the opening region formed in the second light blocking part within the scanning range of the optical scanning part when the control part determines that the image display device is not in an abnormal state. 
     
     
         10 . The image display device according to  claim 1 , wherein the radiation part includes an eyepiece optical system which guides light scanned by the optical scanning part to an eye of a user outside the image display device and directly projects an image on a retina of the user, and is configured to guide the light which passes through the opening region formed in the light blocking part to the eye of the user via the eyepiece optical system. 
     
     
         11 . The image display device according to  claim 10 , wherein the radiation part includes a filter which reduces a light quantity of light which passes therethrough. 
     
     
         12 . The image display device according to  claim 10 , wherein the radiation part is configured to guide the light which passes through the opening region formed in the light blocking part to a position outside the image display device such that a person other than the user can visually recognize the light in addition to the eye of the user.